Additional file 2: Figure S1. of Study on age-dependent pre-existing 2009 pandemic influenza virus T and B cell responses from Chinese population

Image of total IgG+ and influenza hemagglutinin (HA)-specific memory B cells. Total IgG+ and influenza hemagglutinin (HA)-specific memory B cells were measured by a memory B-cell ELISPOT assay (seeded with 5 × 105 PBMC). Cal07-HA, HA protein of A/California/07/2009 (H1N1). Bris59-HA, HA protein of A/Brisbane/59/2007 (H1N1). KLH, Keyhole limpet hemocyanin. (JPG 64 kb)